Telegraph printer



March 9, 1943.

c. J. FITCH Erm.

TELEGRAPH PRINTER Filed Aug. 24, 1940 6 Sheets-Sheet l Qm. um.

March 9, 1943. Uc. .1. FITCH Erm.

TELEGRAPH PRINTER Filed Aug. 24, 1940 6 Sheets-Sheet 2 ATTORNEY March 9, 1943. J. FITCH mu. 2,313,137

TELEGRAPH PRINTER Filed Aug. 24, 1940 6 Sheets-Sheet 3 Arr'oRNEY March 9, 1943. c. J. FITCH ETAL TELEGRAPH PRINTER Filed Aug. 24, 1940 6 Sheets-Sheet 4 ATTORNEY.

March 9, 1943. c. J. FITCH P -rAL TELEGRAPH PRINTER Filed Aug. '24, 1940 6 Sheets-Sheet 5 S R w w m A TTORNEY.

' Patented Mar. 9, 1943 2,313,137 TELEGRAPH PRINTER Clyde J.

Endicott, N. Y.,

Fitch, Endwell and Kurt R. Schneider,

assignors to International Business Machines Corporation, New York, N. Y., a corporation of New York 17 Claims.

The present invention relates to printing telegraphy and more particularly to receiving devices for printing telegraphy wherein a message is recorded by impressing characters upon a tape.

- The invention embodies novel permutation, code signal operated selector mechanism for controlling both the rotative and the axial positioning of a typewheel, in combination with novel printing, tape feeding, ribbon feeding and ribbon reversing, and shift mechanism.

More specifically, a device embodying the invention is provided for the purpose of supplying a simple, compact and light printing telegraph receiver, of few parts, suitable for use on aeroplanes, wherein certain of the permutation members of the selecting mechanism are operable to produce axial positioning of a typewheel and wherein the others of the permutation membersv of the selecting mechanism are operable to produce rotary positioning of this typewheel.

Similar devices of the prior art have comprised complicated mechanisms of a large number oi' parts including complicated shift mechanisms or have required a complicated duplication of printing elements in order to select and print a character from a plurality of sets of characters.

In view of the above conditions prevailing in the prior art, one of the objects of the present invention is to provide a novel receiver for printing telegraphy whereby the foregoing undesirable characteristics are eliminated and wherein the highest number of permutations of both axial and rotatable positioning of a typewheel is obtained with the least number of elements.

Another object is to provide a simple and highly precise receiver fcr printing -telegraphy wherein the typewheel is differentially set by succeeding code signals, and novel means are provided for interlocking and diiferentially releasing permutation members of the selector mechanism.

A further object is to provide a novel receiver for printing telegraphy comprising novel shift means.

Still another object is to provide in a novel receiver for printing telegraphy, a novel typewheel provided with a plurality of rings of type, axially disposed, each ring comprising a plurality of circumferentially spaced characters, alternate characters being, successively, a gure and a letter, and means coacting in a novel manner with said typewheel to produce shift thereof.

A further object is to provide a novel receiver for printing telegraphy comprising simple means, movable in one direction to produce simultaneous rotation in a plane parallel to said direction.

Still another object is to provide a novel ltelegraph receiver of the type operated by permutation code selector mechanism in which the typewheel carries a plurality of rings of type and wherein the selecting mechanism comprises both permutation members for controlling the axial movement of the typewheel and permutation members for controlling the rotative movement of the typewheel.

Another object is to provide a novel telegraph receiver wherein the selecting mechanism comprises permutation members controlled by certain of a plurality of code signal elements to move the typewheel axially and permutation members controlled by others of the plurality of code signal elements to move the typewheel rotatively and means cooperating with said typewheel in certain combined axial and rotary positions thereof to produce a shift of the typewheel.

A further object is to provide in a telegraph receiver, novel motion producing mechanism comprising permutation members controlling the bodily axial movement of the typewheel.

Still another object is to provide in a telegraph receiver, novel typewheel positioning means coinprising a plurality of clutch devices and means responsive to received code signal elements for l,

releasing and selectively stopping said clutches in different portions of one complete revolution thereof.

A further object is to provide in a telegraph receiver, novel typewheel positioning means comprising a plurality of clutch devices and a plurality of rotatable permutation members controlled by received code signalr elements for releasing and for stopping said clutch members in permutations of different respective rotatable positions dependent upon the permutation of code signal elements received.

Another object is to provide in combination with a telegraph receiver of the present type including ribbon feeding mechanism, novel means for producing an automatic reversal of the ribbon feed.

A further object is toprovide in combination with a telegraph receiver of thev present type including printing mechanism, novel printing hammer operating mechanism.

Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, whichhas been contemplated, of applying that principle.

' In the drawings: Fig. 1 is a front elevation, partly in section, of an embodiment of the present invention.

Fig. 1a is a detail view illustrating the operation of elements of the shift control mechanism. Fig. 2 is a plan view of the device of Fig. 1, with the ribbon feeding mechanism omitted.

Fig. 3 is a partial plan view of the device of Fig. 2 illustrating, on an enlarged scale, the two groups of permutation rings comprising the selector mechanism.

Fig. 4 is a sectional view, on an enlarged scale.

taken on the line 4-4 of Fig. 1.

Fig. 5 is a sectional view, on an enlarged scale, taken on the line 5-5 of Fig. 4.

Fig. 6 is an exploded view illustrating the construction of one of the selector clutchl mechanisms.

Fig. 7 is a sectional view illustrating details of construction of the clutch mechanism of Fig. 6.

Fig. 8 is an exploded view illustrating the construction of thevelements comprising the shift mechanism. A

Fig. 9 is a view similar to Fig. 8, at a different perspective, illustrating the opposite sides of the elements comprising the shift mechanism.

Fig.`10 is a diagrammatic view illustrating the manner of rotation of the ltypewheel during shift.

Fig. 11 is a view similar to Fig. 10 illustrating the typewheel in a shifted position.`

Fig. V12 is a development of the printing surface of the typewheel.

Fig. 13 is a detail view illustrating the construction of the ,permutation ring interlock and release mechanism. i

Fig. 14 is a side elevation illustrating the construction of the ribbon feed and ribbon reversal mechanism.

Fig. 15 is a view similar to Fig. 14, with parts of a gear 25e (Fig. 4). Fastened to shaft 25a at the other end thereof, is a pulley 23 driven by a belt 21 which in turn is driven by a pulley 23 fastened to the shaft 23 '(Fig. 2) of motor 33. Gears 23 and 24 are of equal diameter which is' so chosen with respect to the diameter of gear 25 as to rotate gears 23 and 24 at 1200 R. P. M. upon rotation of gear 25 at the rate of 900 R. P. M. By means of this difference in speed of rotation, the typewheel may be completely set before other functions are performed, as will be pointed out in detail later. I

In axial alignment 'with the shaft 23a is a shaft o 23A (Fig. 2) carrying a generally cylindrical element 3| having a helical shaped cam groove 3|a formed in the outer periphery thereof.

' In axial alignment with the shaft 24a is a. shaft I 24A (Figs. 2 and 4) carrying the composite typewheel 32, mounted on shaft 24A for rotation therewith and axial movement with respect thereto, as will be described presently.

In axial alignmentwith shaft 25a is a shaft 25a carrying the shift operating cam 33 (Figs. 1 and 4) print hammer operating cam 34 (Fig. l) and the ribbon feed and reversal mechanism operating cam (Figs. 1 and 4) Shaft 24A is supported at one end in the ball bearing 35 (Fig. 4). The other end of shaft 24a terminates in a hollowed out portion 31 into which is inserted the shaft portion 38h (Figs. 4

- and 6) of a clutch mechanism 39. Shaft portion 38h is supported by a roller bearing 40 (Fig. 4)

enclosed in housing 40a (Fig. 2) and is fastened omitted, illustrating the gear drive of the ribbon f feed mechanism.

Fig. 16 is a view similar to Fig. 15 illustrating the position of a star Wheel just prior to ribbon reversal. Y

Fig. 17 is a. view similar t0 Fig. 16 illustrating the position of the star wheel .lust after reversal of the ribbon feed mechanism.

Fig. 18 is a plan view on an enlarged scale illustrating the mounting of the ribbon feed and reversal mechanism. 1,.

Referring to the drawings, and more particularly to Figs. 1, 2 and 4, the printer mechanism comprises a supporting frame 2|) having a vertically extending lug 20a to which is attached a plate 2| by a slotted screw 2|a. Fastened to plate 2| by suitable means (not shown) is a casing including a three-section gear box 22 hous ing the gears 23, 24 and 25. Gears 2 3 'and 24 are suspended above and in mesh with gear 25 (Fig. 2) by means of shafts 23a and 24a to which the gears 23 and 24 are, respectively, attached. Shaft 24a is mounted in ball bearings 24h, 2lb

carried by the walls of the gear box (Fig. 4)vv the shaft 24a carrying at one end thereof the gear Gear 25 Which,as is seen from Figs. 2 and 4, Y

meshes with both gears 23 and 24, is attached to the main drive shaft 25a which is mounted in ball bearings 25h, '25h supported in its sectionof the housing, shaft 25a carrying at one end there- 75 to shaft 24A by a pin 4| (Fig. 4). Clutch 33 is provided with a dog lift lever 42 (Fig. 6) controlled by stop members acting in commotion with the permutation rings of the selector mechanism, in a manner to be described presently. By control of the dog lift lever 42, the clutch 3l may be stopped in various chosen rotative positions and a tooth 43t of the clutch mechanism will thereupon be disconnected from the driving gear 24e, (similar to 23e, Fig. 6) all as described presently. Upon release of the dog lift lever 42, as will be presently described, thel tooth 43t moves into engagement with the driving gear 24e (Fig. 5) whereby the clutch 38 will be rotated until lever 42 is again engaged by a permutation ring controlled stop member thereby positioning the clutch 39 and shaft `24A in accordance with the setting of the permutation rings which control the lever 42 of that clutch 3l pertaining to shaft 24A.

Clutch 39 pertaining to shaft 24A is an eight position clutch, generally of the type as fully described in the Patent No. 2,206,646 granted to Kurt R. Schneider, July 2, 1940, and comprising a cylindrical member 38 provided in this particular clutch with a series of eight notches such as 44 (Fig. 6) formed in a flange member 33a integral with member 38. The shaft portion 33h previously referred to, which is integral with member 33, extends into the hollowed portion 31 (Fig. 4) of shaft 24A and is attached thereto,

as described above. A pawl member 45 is pivoted at 45a and is urged by a spring element 45h (Fig. 7) into engagement with flange member 33a to cooperate with a notch 44 and thus prevent back rotation of the clutch when stoppedin any one ofy its eight rotative positions.

As is seen from Figs. 6 and 7, the face of member 38 adjacent to its gear'24c (similar to 23e, shown) is provided with a channel 46 in which is slidably mounted dog member 43 having the tooth 43t mentioned above. A support member 38e, integral with member 38, extends part way into channel 46 and is provided with a reduced portion 38d axially supporting a cylindrical spring member 41 located in a bored portion 43a formed in dogmember 43, the spring member 41 constantly urging the member 43 in such a direction (to the right, in Fig. 6) so as to attempt to engage tooth 43t with the teeth of its gear 24e, similar to 23e (Fig. 6).

Dog lift lever 42, described above. extends crosswise of dog member 43 and has a generally ball-shaped end 42a (Fig. 6) tted into a socket shaped recess 38r formed in the face of block 38 adjacent channel 46. A center portion 42h of lever 42 engages the sidesv of a recess 43r formed crosswise of dog member 43, this center portion being rounded to provide rolling engagement between the sides of recess 43T and the portion 42h. The opposite end of the lever 42 is cut diagonally to form a tooth portion 42t projecting beyond the circumference of member 38. A slot 38s is formed in the face of member 38, generally at right angles to channel 46 to permit oscillation of lever 42, with respect to 38, about the ball and socket members 42a and 381', respectively, when 42t is engaged by a stop as described later. This oscillatory movement is transferred to the dog member 43 to produce longitudinal movement thereof, against the force of spring 41 to compress the same.

The tooth shaped end 42t is held in the position as illustrated in Fig. 5, against the force of spring 41 (Fig. '7) and upon release of its tooth shaped end, lever 42 will permit dog 43 to be moved by spring 41 so as to engage tooth 43t and gear 24e, as described presently.

When tooth 43t is released upon a change in setting of the members of the permutation unit, as described later, the dog member 43 will engage its tooth 43t with gear 24e and lever 42 and member 33 will be rotated by means of gear 24e in the direction as indicated by the dash arrows in Fig. 5. Upon engagement 'of end 42t and a stop member controlled by the elements of the permutation unit, as described presently; the lever will be relatively moved, wtih respect to 38, about its ball and socket connection to the position as shown in Fig. 5, thereby disconnecting tooth 43t and gear 24e.

Back rotation of element 38 is prevented by engagement of pawl 45 with one of the eight notches 44 formed in the flange 39a of this particular clutch, thereby stopping the clutch at one of eight predetermined positions when the clutch is controlled in the novel manner as presently described.

Shaft 23A is supported at one end by a ball bearing similar to bearing 36 of shaft 24A and contained in housing 48 (Fig. 2). The other end of shaft 23A terminates in a hollowed out por` tion, similar to portion 31 of shaft 24A, into which is inserted a shaft portion 38h of a clutch 39, similar to that provided for shaft 24A with the exception that the flange member 38a of this clutch is provided (Figs. and '7) with four notches 44 only, to prevent back rotation of this clutch member from any one of the four stop positions.

Shaft 25A is similarly supported at one end by a ball bearing 36 (Fig. 4) and is provided with a hollowed out portion similar to portion 31 of shaft 24A, into which projects a shaft portion 38h of a clutch 39 associated therewith, and similar to clutch 39 of shaft 24A, with the exception that only -one notch 44 is provided in its flange member 38a to prevent back rotation at one stop position only of shaft 25A, as described presently.

Typewheel positioning Novel means are now provided for positioning a typewheel character carrying element 68 of the' composite typewheel 32. The positioning of typewheel element 58 includes three separate operations, namely, rotatively positioning the typewheel element,v axially positioning the typewheel element and zoneI positioning of the typewheel element, which zone positioning comprises the shift function. These three operations will now be described in detail.

Rotatice positioning of the typewheel As illustrated in Fig. 2, a plurality of five magnets is provided, each responsive to one element of a 5-unit code signal. Three of the magnets 5I, 52 and 53, respectively, are utilized to control permutation ring members which in turn regulate the rotative positioning of the typewheel, and the remaining two magnets 54 and 55 control the axial positioning of the typewheel, all as described presently. A magnet 55 (Figs. 4 and 5) is connected in the return line of the other five magnets and is operated upon energization of any one of these magnets, to produce tape feed', ribbon feed, printing and zone positioning, all as described presently. It is deemed obvious that magnet 56 may be independently connected for operation by a separate code signal component, such as the stop component, if sequential code signal components are utilized.

Referring to Figs. 3, 4 and 5, means entering into a novel combination with the respective clutches 39 are disclosed therein. That particular clutch 39 which controls the rotative positioning of shaft 24A and therefore the rotative positioning of the typewheel is shown as surrounded by a plurality of three permutation selector rings 51, 58 and 59, respectively, contained within the casing 60, mounted on the side of gear box 22. These rings are maintained in position surrounding the clutch 39, by means of casing 60 and eight clutch stops 6i, as shown. Each of the stops 6| is formed as a yoke having a toothed portion 61a at one end thereof bearing against the outer periphery of the three rings and another portion 6 Ib comprising a laterally extending stop cooperating with the toothed end 42t of lever 42 when the particolar stop is selected and permitted to operate by means of the different settings of the permutation rings. The eight stops are uniformly, circumferentialiy distributed about the rings, as disclosed in Fig. 5. Each of these stops is mounted for radial movement and is constantly urged towards the center of the rings and against the outer peripheries of the rings, 4by means of individual springs 63. Each of the three permutation rings is held against bodily lateral movement between the solid end of casing 68 and the mid-portion of thestops 6l, the rings riding on support 62 (Fig. 4). Each of the rings 51, 58 and 59 may be rotated by means of an arm 64 (Fig. 5)

extending outwardly from casing 60 and connected to an individual tension spring 65 whch constantly holds the corresponding ring in one of two rotary positions. Each of the arms 64 is connected by a link 66 to one end of a levei` 61 which is pivoted at its other end 68 to a point 69 and connected near its mid-point to a movable core 10 controlled by the corresponding magnet; the rings 51, 58 and 59 being thus connected to the 4 asians? magnets 53, 52 and 5|, respectively. Uppn-V energization oi' any one of the magnets 5I, 52 or 53, the corresponding ring will be rotated against the pull of its associated'ring 55 and will assume its second rotary position. f

As shown, (Fig. 4) there are three permutation rings encircling that clutch 39 which controls the shaft 24A and since each ring may be operated to any one of two positions, a total of eight permutation positions may be obtained. Each of the three rings is provided with a series of eight notches, each one respectively of the series of the respectiveinotches being designated as 511i, 581:

and 581x, which notches are formed in the outer periphery of the corresponding ring,- the notches on the respective rings being so positioned relatively to each other that a plurality of three notches, and three only, one only on each of the respective rings, will be aligned foreach ofthe eight permutation positions of the three rings and such alignment occurs directly beneath one of the resiliently operated stops 6i. T he toothed portion Sia of the particular stop selected, will enter the three respective aligned notches 511:, 58u and 591i in the three rings, under the. in1luence of its spring 63 while all of the remaining for selecting the intermediate zone positions between each of the chosen eight rotative positions;

As is seen from Fig. 12,'the circumferential positions in each ring of characters are divided alternately into figures and letters characters, so that selection of the respective zone positions corresponds to a shift of the typewheel. 'I'he manner and mechanism for'zone positioning or shifting of the typewheel will be described presently.

Axial positioning of the typewheel the permutation rings 1i and 12 may be posistops are held in their most remote radial position by the outer peripheries of the three rings. A different stop is, therefore, permitted to move radially inward for each of the eight permutation positions of the three rings.

Assuming that this clutch 39 was previously stopped in one position by engagement between a stop element 5i and its lever `42; upon reception of a different signal permutation which energizes at least one of the magnets 5i, 52 or 53, one of the rings 51, 58 or 59 will be rotated to its second rotative position and the previously rotated rings V will be reset to the first rotative position by means of their respective springs 65. Upon rotation of any one ring to its second position, a different set of notches on the respective rings will'be aligned and another stop member will be newly set, and the previously set stop member 6 I` will be cammed out of its associated group of notches so that the lever 42 will be released from the previously set stop member thereby permitting the dog 43 to move its tooth 43t into engagement with gear 24c. The clutch 39 will thereupon be rotated until tooth 42t of lever 42 engages the laterally extending end Gib of the newly set stop member 6I which has entered the last three aligned notches of the rings 51,` 58 and 59. Upon this engagement of tooth 42t and the chosen stop member 6 i, the dog member 43 is operated against the force of spring 41, its tooth 43t is disengaged from the v gear 24c and the clutch is thereupon `stopped in its new position. One ofthe eight notches 44 formed in the flange 38a of this clutch, will be engaged by its pawl 45 under the urge of spring 45h to thereby prevent back rotation of clutch 39. By this rotation of clutch 39, shaft 24A and typewheel member 50 will be rotatively positioned in accordance with the particular relative setting of the permutation rings 51, 58 and 59 or, in other i words, in accordance with the particular permuf tation of three of the code signal elements rei ceiVed. In this manner, any one of eight circum- A .ferential positions of the typewheel can be se lected. i As is seen from the development of the typewheel 50 (Fig. l2), there are sixteen rotative orv rcircumferential positions. ,f :equally spaced circumferential positions are Since only eight chosen by the three permutation ring elements '51, 5l and 59, additional means must be provided tioned in each of two positions, there is a total of four permutation positions possible for these two rings and one of the four stop members 8l (Fig. 5), distributed as illustrated in Fig. 5, will be aligned with a set o1' two notches 1in, 121i in the respective rings 1| and 12, in each of the four permutation positions of rings 1i and '12,`

so that the particular clutch 39 controlled by rings 1I and 12 and controlling the rotation of shaft 23A will be stopped in any one of four different rotative positions, in the same manner as described in detail with respect to shaft 24A which can be stopped in any one of its eight rotative positions. A plurality of four notches 44 (Fig. 7) cooperates with a pawl 45 to prevent back rotation in any one of these four positions.

It is to be particularly noted, that those ones of the magnets 5i to 55, inclusive, which are energized in accordance with a particular received code permutation of signal elements, do not remain energized until reception of the next character signal but these selected magnets are only momentarily energized. Consequently, the permutation selector rings must be locked in position after the momentary energization of the selected magnets, in order to prevent the springs 65 from'returning the rings to their initial positions. 'Ihe locking means must also be releasable in order to set the rings in accordance with a sequentially received code signal. Novel means` are therefore provided for interlocking the permutation rings pertaining to the different shafts l and for releasing the selectively set rings when the succeeding code signals differ.

Referring to Figs. 3, 5 and 13, an interlocking pawl 13 is pivoted at 13p and is urged in a clockwise direction by lever 14 pivoted at 14p and biased into engagement with pawl 13 by meansV of a spring 13s. Pawl 'I3 is generally S-shaped and has a tooth 13a at one end .which bears on the peripheries of, rings 51, 58 and 59 and has a tooth 13b at the other end which bears on the peripheries of rings 1I and 12. .Each of the flve permutation rings has two special notches 13ni, 1311.2, formed in its outer periphery, in addition to the regular notches previously described,

Y element 13t which does not extend to the outer circumference of the ring so that when any one of the five rings is rotated from its rst to its second position, the interlocking pawl 13 will 10 be` cammed counterclockwise to clear the teeth 18t to unlock the rings and to thereby permit those rings whose magnets are'not energized, to return to the first position under the control of the respective springs 65 and those rings per- 15 taining to the magnets which are energized are permitted to remain in or to be moved to the second position whereupon the pawl teeth 13a and 13b will drop into position to lock the rings in their newly assumed positions.

With a 5,-unit code, the following situation 20 may arise.A `A character signal received, may require the positioning of rings 58 and 1l for example in their second positions and rings 51,

59 and 12 in their rst positions while a sequen- 25 tially received character signal may call for ring 1I in its second position and all of the other rings in their rst positions. Under the assumed conditions, none of the rings is to be moved from A its rst to its second position by the sequentially 30 received signal. In order to insure release of the rings under the conditions assumed, the rings are so mounted andoperated as to overrun their finally assumed second position, when operated by the respective magnets. Thus, in the exam- 35 ple chosen, although ring 1I is already in its second position, it will, upon reception of the sequential signal, be oscillated past this finally assumed second position, a slight amount 4and tooth 13b of the pawl will be cammed counter- 40 clockwise (Fig. 13) and since the teeth 13t do not extend to the outer periphery, tooth 18a will no longer hold ring 58 which returns to its initial position under the control of its spring 85 so that all of the rings except ring 1l will assume 45 their original positions.

It is seenl therefore, that upon oscillation of any one of the rings 51, 58 or 59, that the previously selected stop 6l will be cammed out of its cooperating notches to release lever 42 of the 50 corresponding clutch and will allow the clutch to interconnect shafts 24a and 24A for simultaneous rotation until the lever 42 is again halted by the newly selected stop. Similarly, os-

cillation of either one of the rings 1| or 12 will 5 allow shafts 23a. and 23A tobe connected for rotation to a new position.

As is seen inFig. 2, the rotative positioning of the shaft 23A, under control of its four position clutch, rotates the cam member 3| to antr one of four different rotative positions. Upon such rotation, cam slot 3la will be rotated so that the sides of the slot can be utilized to produce movement axially of shaft 23A.

A forked. lever 15 (Fig. 2) pivoted at 15p, 65

has a ball-shaped member 15a at one end of the single arm thereof which ball rides in cam groove Sla to thereby rotate Athe lever 'l5 in a horizontal plane about pivot 15p upon rotation of shaft 23A. The forked ends 15b and 15o (Fig. 70

4) of lever 15 are provided with rollers '|51' which engage the sides of a circumferentially extending groove 16 (Fig. 2) formed in a cylindrical member 11 comprising an element of the composite typewheel 32. Upon rotation of shaft 23A 75 to assume any one of its four rotative positions under the control oi' the permutation rings 1I and 12, the cam slot SlaV will move the balllshaped member 15a, to four difieren-t positions 5 axially of shaft 23A, to thereby oscillate lever 15 about pivot 15p4 to move the arms 15b andv 15e laterally whereby themember 11 and typewheel element 50 is moved axially of shaft 24A to four differentpositions. The construction of the composite typewheel proper 50 will now be described in detail.

' Referring to Figs. 2, 4, s, 9, io and 11, the I diametrically aligned slots 19e extending radlally inward from the outer periphery of the flange. A pair of diametrically opposed, rectangular apertures 19d (Fig. 8) are cut through the wall of the cylindrical member 19a, adjacent the opposite end thereof, from the outer periphery to the inner bore 19e.

Zone selection operating member 18 is provided with an elongated, generally elliptical opening 18a in the center thereof whereby member 18 can be mounted on the cylindrical portion 19a of member 18 for rotation therewith but at the same time being free to move axially thereof under the control of zone selecting mechanism to be described later. One face of member. 18 (Fig. 9) is provided with a pair of dia- `metrically opposed projecting lugs 18h, 18h

which fit into and slide`against the sides of slots 19e when member 18 is mounted in position on member 19, as illustrated in FigsI 2 and 4. The opposite face of member 18 is provided with a pair of diametrically opposed cylindrical lugs 18o, 18o (Fig. 8) which project respectively into each of the eccentric slots 50a (Fig. 9) formed in the face of the typewheel element 50 whereby the typewheel is rotated upon operation of member 18, as described presently. A pair of holes 18d, 18d are formed in one side member of member 18 which holes coact with a ball member 50h (Fig. 9) in an opening 50c formed in typewheel element 50, said ball member being urged toward the holes 18d by means of a helical spring member 50s, to maintain the member 18 in either one -of `the positions to which it is operated, it being noted that the holes 18d are of smaller diameter than ball 59h, so

that only a portion of the ball enters one of the openings 18d, and upon movement of member 18, radially of member 19a, as described pres-v ently, the ball 50h, is disengaged from one hole 18d and subsequently engaged. with the other. The typewheel 50, as previously described, has

a plurality of letters and figures formed in the outer periphery thereof, the sixteen axially extending rows comprising alternately figures and letters, as illustrated in development in Fig. l2,

so that, upon rotation of the typewheel element ently. A pair of rounded notches 5011., 52:: src

provided on the inner periphery of the typewheel.

element 88 which coact with a spring urged ball element 11e (Figs. 4 and 8), to stop the type-- wheel element in either one yof two alternate positions. axial bore 58a so that this element can be mounted on the cylindrical member 18a, as-disclosed in Fig. 4.

Member 11 is provided with a pair of diametrically opposed slots 11a extending radially from the outer periphery thereof to the inner bore 11b, into which is inserted the cylindrical portion 19a of member 19, as shown in Fig. 4, until cylindrical portion 19a abuts end 11d provided with an opening 11e for shaft 24A. 'I'he the other slot 11a of member 11, to connect the members 11 and 19 to shaft 24A for rotation therewith and to permit movement axially thereof. Typewheel 58 is locked to member 11 by means of spring 11s (Fig. 4) and ball 11c, for

rotationtherewith upon rotation thereof and moves axially of shaft 24A upon axial movement of members 11 and 19. Member 18 is held between flange 19h on one side and typewheel 58 on the other, but in one axial position of the typewheel assembly, the member 18 is moved radially, by means to be described presently, to thereby rotate the typewheel one sixteenth of a revolution to produce shift of the typewheel element.

Zone positioning or shift Novel means are now provided, as shown and claimed in applicants' copending application Serial No. 419,572 filed November 18, 1941, for producing zone positioning or shift of the typewheel. As described above, inl one axial position of the typewheel element, zone positioning, operating member 18 is so located as to be operated axially, to thereby shift the typewheel element one sixteenth of a revolution, which operation comprises the shift of the typewheel from letters to figures or vice versa, since, as is seen in Fig. 12, the axially extending rows of characters are alternately letters and figures.

Shaft 25A is provided with the operating cam member 33 adjacent one end thereof (Fig.Y 4) which rotates in the same plane, as lever 8| (Fig. l) having an elongated aperture 8|a formed in one end thereof into which projects a pin 82 connected to the frame 28.` A spring 8|s is attached at one end to the lever 8| adjacent the lower end of the elongated `aperture 8|a and is connected at its other end to asupport piece 88.l

Lever 8| is/positioned so as to abut the button 88 (Fig. 4) spring pressed by helical spring 85 against one face of the lever 8|. By means of the pivot suspension of lever 8| composed of the pin 82 extending into the elongated slot 8|a, and by means of the resilient support provided by spring 8|s and the spring pressed button 84, the lever 8| is protected against deformation. If for any reason, the timing between the cam 88 and the typewheel is not correct and lever The typewheel 88 is provided with an` 8| is raised before the typewheel assumes its extreme right hand position (Fig. 4), the resilient support of the lever 8| will 'injury tothe lever or typewheel.

Upon reception of the code signal indicative of shift, the typewheel will be moved to its extreme right hand position, as viewed in Fig. 4. with the member 18 extended off center from shaft 24A, downwardly, an amount dependent upon the eccentricity of opening 18a (Fig. 8) and with' member 18 in alignment with lever 8|. As shaft 28A rotates, cam 89 rides across the bottom of lever 8| and raises the free end 8U' (Fig. la) of this v lever into engagement with zone selection, operating member 18 and due to the coaction of lugs 18b and slots 19o moves the member 18 radially of the shaft 28A. Upon such radial movement, the cylindrical lugs 18c'(Fig. 8) riding in the eccentric slots 58a (Fig. 9) will rotate the typewheel one sixteenth of a revolution to thereby shift from letters to figures or vice versa.

As is seen from Figs. 10 and 11`, upward motion of member 18, as viewed in Fig. 4. will move lugs 18c in slots 58a to rotate the tyepwheel 58. With member 18 in one downwardly extending position, the lugs 18c will be moved from the position as shown in Fig. 10 to the position as shown in Fig. 11 and the typewheel will be rotated one sixteenth of a revolution in one direction. Upon 180 rotation of shaft 24A, the opposite operating end of member 18 (Fig. la) will now be pro- .-jecting downwardly and upon upward movement of member 18 by lever 8| the typewheel 58 will.

Tape feed and printing A roll of tape 88 (Fig. 4) is mounted within the tape roll support 81 attached by a bolt 81a to the arm 88 (Figs. 1 and v2) carried by the frame 28. Tape 88 unwlnds from its roll and passes under and over a plurality of guide rollers 89 and finally underneath the typewheel 58 and between the feed rollers so that upon rotation of the feed rollers, as described presently, the tape 88 is fed past the typewheel element 58, and the characters of the typewheel, which are selected by the permutation selector mechanism, will be typed upon tape 86 by means of the printing mechanism to be presently described.

The feed rollers each comprises a pair of sep arate rollers 98a and 98b and 9 la and 9|b, respectively. Rollers 98a and 98h are rotatively mounted on stationary studs 92. Rollers 98a and 98h are each provided with a gear 93 (Figs. 1 and 2) integral therewith and meshing with gears 94, respectively, fastened to the shaft 95. Shaft 98 is rotatably carried by a lever 98 (Fig. l) pivoted at 91 to the frame 28. The lever 98 is biased upf wardly (Fig. 1) by a spring 98 so that rollers 9|a and 9|b are constantly urged towards the rollers 98a and 88h with the tape 86 between the respective pairs of rollers, as is seen in Fig. 1. Mounted on the shaft for rotation thereof is the ratchet wheel 99 located between the rollers 9|a and-SIb (Figs. 1 and 2). A pawl |88 pivotally mounted at |8| on lever |82 engages a tooth of ratchet 99, and upon depression of lever |82,

prevent breakage or as described presently, pawl |00, which is constantly urged into engagement with ratchet wheel 99 by means oi a spring |003, will slide over a tooth on the wheel 99 and engage the next lower tooth of the ratchet wheel so that upon release of the lever |02, pawl will rotate the ratchet wheel 99 an amount proportional to the advancement of one tooth,'to in turn rotate the shaft 95 and gears 94 meshing with gears 93 integral with the rollers 90a and' 90b. Since rollers 9|a and SIb are integral with the shaft 95, the rollers 90a, 90b, and the rollers 9Ia and 9|b are rotated simultaneously to advance the tape 86 past the typewheel 50.

Novel printing means are provided, as shown and described in applicants copending application Serial No. 400,600, iiled July 1, 1941, and comprise lever |02, as shown in Fig. 1, which is mounted at one end on pivot |03 passing through frame 20. The other end of lever |02 is constantly urged upwardly by a spring element |04. Lever |02 passes through a slotted opening |05 formed in the print hammer housing |06, fastened to frame 20 in any desired manner. A vertically reciprocable hammer member |01 is mounted within the print hammer housing |06 (Fig. 1) and is constantly urged upwardly by means of a spring |08 pressing against the piston portion |01a of the hammer |01. A slot I01b is formed in the hammer member |01 in alignment with slot and the lever |02 passes through the slot I01b so that upon downward oscillation of lever |02, it will depress the hammer |18 and bell-crank H9, restores the armature 50a to the position as shown in Fig. 5.

It is seen, therefore, that shaft A is rotated once for each code permutation ci' signal ele`- ments received. Upon rotation oi shait'26A.' cam 34 (Fig. 1) vwill depress the lever |02 to lower the plunger |01 until the trigger latch |09, continuously urged counterclockwise by spring'l09s, engages the notch |01n to hold the plunger in the cocked position, asn described above. 25A continues to rotate, the cam 34 will engage the cam follower |091 to release the trigger latch |09 and the spring |08 will'quickly force the plunger |01 upwardly to force the tape 86 and ribbon II3 into operative relation with the typewheel character selected by the permutation selector mechanism to thereby print character on the tape 86.

Ribbon feed and reversal Novel ribbon feed and ribbon reversal mechanism are provided, as shown and claimed in applicants copending application Serial No. 419,573

' IIO, so that as cam 35 rotates, it engages lever 34 and 35 previously mentioned, cooperating respectively with the levers 8|, |02 and |I0, cam 34 also cooperating with a cam follower |||9b of the trigger latch |09, as described presently. The lever IIO is pivoted at III for oscillation in a vertical plane and is pivotally connected to the link ||2 for feeding the type ribbon |I3, as will be described presently.

As previously described, the flange member 38a, of that clutch 39 which controls the shaft 25A, is provided with a single notch 44 (Fig. 5) to prevent back rotation of the clutch upon stoppage of this clutch in its single position. The tooth shaped end 42t of the dog lift lever 42 oi this tion of any magnet, the magnet 56 is energized to attract its armature 56a whereupon the bellcrank ||9 is oscillated clockwise about pivot |20 to raise the link ||6 and lower the free end ||4a of lever I I4 to thereby release the dog lift lever 42, so that tooth 43t engages the gear 25o and clutch 39 is rotated one complete revolution, prior to which time, the magnet 56 is deenergized and the spring I I4s, acting through the lever I I4, link ||0 once for each revolution of shaft 25A and raises lever I|0 and the attached link |I2.

Referring to Figs. 1 and 4 and to Figs. 14 to 18, inclusive, link ||2 is pivotally connected at one end by pivot |2| to lever I|0 and at its other end by pivot |22 to one arm |23 of a bell-crank element |24 mounted for rotation about shaft |25 journaled in plates |26 and |21, mounted on the frame 20. A pawl |28 pivoted at |29 to the bell-crank element |24 is biased against a ratchet wheel |30 by a spring I28s (Fig. 14) attached to the arm |24a of bell-crank |24, at one end, and to pawl |28 atvthe other. As link I|2 is raised by the action of cam 35 on lever I I0, the pawl |28 will be moved back one tooth on the ratchet wheel |30, attached to shaft |25 for rotation thereof. As the cam 35 releases the lever IIO, spring |I0s will pull downwardly on lever I I0 and link ||2 so that pawl |28 will advance the ratchet wheel |30 an amount proportional to one tooth movement. A locking pawl I3I pivoted at |32 on plate |26 (Figs. 4 andA 14) is held in engagement with ratchet wheel |30 by a spring I3Is, so that back rotation of ratchet wheel |30 is prevented. As the ratchet Wheel |30 advances counterclockwise, it rotates the shaft |25 counterclockwise to thereby rotate gear |33 (Fig. l5) in the same direction. Gear |33 meshes with iive small pinion gears |34 each loosely mounted on a stud |35, which studs Join together the star wheels I36a and |36b loosely mounted on shaft |25. As gear |33 is rotated counterclockwise, step by step, the pinions |34 will be rotated clockwise about their respective studs. A lever |31 pivoted at |30 on plate |26 carries a roller |39 intermediate its ends, engaging the outer periphery of star wheel I36a (Fig. 18). The other end of lever |31 is constantly urged clockwise by a spring I31s connected to lever |31 at one end and to plate |26 at the other so that the roller |39 is constantly held against the outer periphery of the star wheel I36a.

As illustrated in Figs. 14 and 15,v one of the AS Shaft the selected gears |34 is in meshing engagement with a gear |40 mounted for rotation on shaft |4| Journaled in plates |20 and |21. Shaft 4| extends through the plate |24 (Fig. 18) and carries at its end a -spool |42 on which may be wound the ribbon H3. A friction washer |4210 is provided between the spool |42 and plate |20 to prevent shaft |4| from turning too freely. A similar spool |43 is mounted on a shaft |44 journaled in plates |20 and |21 andattached to this shaft is a gear |45 equal in diameter to the gear |40. AV friction vspool'l42 and gear |40 are held against further rotation endeavored to.,be produced by means of pinion |34. Pinion |34, therefore, (Fig. 15) walks bodlLv around gear` |40, so that the star Wheels are rotated counterclockwise despite the force exerted by spring |31s operating through the lever |31 and roller |39. As is seen by comparison of Figs. 15 and 16, the star wheels are rotated counterclockwise, since the spring |313 is no longer strong enough` to prevent rotation-of the star wheels, and roller |39 thereupon rides up to the peak of a tooth |39a of the star wheel |35a, directly behind|35b, as shown in lig. 16, and as the pinion |34 continues to walk around gear |40, the star wheels are rotated until roller |39 passes the peak or high point of a tooth |39a and due to the generally toggle arrangement the star wheels are thereupon snapped counterclockwise to bring a different pinion |34 into engagement with gear |45, while the previously engaged pinion |34 is disconnected from the gear |40, as is seen in Fig. 17. As gear |33 is rotated step by step, counterclockwise, by elevation and depression of` link ||2, pinion |34 in engagement with gear |45 rotates the gear |45 counterclockwise as viewed in Fig. 14 or clockwise as viewed in Fig. 1 whereby the ribbon is now wound around spool |43 and unwound from spool |42.

Similarly. as described above, if the ribbon should snarl or catch or should in any manner exert a force so'asto prevent rotation of the spool upon which the ribbon is being wound, an

automatic reversal of the ribbon feed will ensue.

Due to the two simultaneous rotations of the pinions |34, that is, clockwise rotation of these pinions about their studs and counterclockwise or bodily rotation thereof about shaft |25, there will be no jamming of the gears during shifting of the gear frame when one of the pinions |34 is coming into mesh. (Figs. 15 and 16) with the previously disengaged one of the two gears |40 and |05. VSince there-is always a positive connection between the driving means and at least one of the ribbon spools during ribbon feed reversal. it is impossible for the gear frame to be halted at the dead center of the toggle arrangement while characters are being printed.

Novel ribbon reversal means are therefore provided which automatically and expeditiously produce ribbon reversal whenever such a reversal is necessary.

, General operation While the operations of lthe various elements of the completemechanism have been given in' connection with the respective individual descriptions, a brief description of the operation oi' all elements of the device will now be presented in order'tov clarify the novel coaction of the relative parts in producing a unitary result, namely. printing of characters on a tape in response to code signal permutations received'. each permutation being representative of a character to be printed or a function to be performed.

Upon reception of the five signal elements comprising a code permutation, certain of the mag-4 nets 5|, 52,53, 54 and 55 (Fig. 2) will be energized. Upon energization of any ene of the magnets 5|, 52 or 53, the permutation rings 51, 5 0 and 53 (Fig. 5) will be relatively rotated to align certain of the notches 511i, 50u and 53u so that a v chosen stop element 6| will be permitted to enter the aligned notches. As the rings are operated to permit the chosen stop element to enter these aligned notches, the previously selected stop element is cammed out of its notches by the rotation of any one of the rings and the associated clutch 33 will, thereupon engage and will rotate until the chosen stop element engages the toothed end 42t of thev clutch dog lift lever 42.

controlling the magnets 5|. 52 and 53.

Similarly, magnets 54 and 55 are energized selectively, by the received code signal permutation and permutation rings 1| and 12 (Fig. 5) will be relatively rotatively positioned, to permit Y entry of a stop element 6| into the newly aligned notches 1|11. and 121i. The associated clutch 33 will be thereupon rotated until the newly selected stop is engaged by dog lift lever 42 and shaft 23A will be rotatlvely 'positioned in accordance with the particular permutation of code signal elements controlling solenoids 54 and 55.

Rotation of shaft 23A oscillates the arm 15 (Fig. 2) to axially move the typewheel 50 to one of four axial positions to select one ring of characters.

Rotation of shaft 24A as described above will rotate the typewheel element 50 to one rotative position so that the particular character from the selected ring of characters will be selectively positioned with respect to hammer |01 (Fig. 4).

vUpon energlzation of any signal receiving magnet, the magnet 56 (Figs. 4 and 5) which is in the return circuit of all the magnets 5| to 55, inelusive, will be energized. The particular clutch 39-controlled by magnet 55 has only one rotative y stop position, so that shaft 25A is rotated one complete revolution and one revolution each' code signal permutation received.

Asshaft 25A rotates its one full revolution the only, for

cams as (rigs. 1 and 4), :u mg. 1). and as (Figs.

l and 4) will be rotated.

Since shafts 23A and 24A are rotated at 1200 .R. P. M. while the shaft 25A is rotated only at 900 R. P. M.; regardless of which stop elements arey selected, the shafts 23A and 24A will be halted by the time shaft 25A has completed three quarters of a;revolution.

If the code signal received is representative of the shift'function, the typewheel element 50 will be moved to the right of the position as illustrated in Fig. 4 until it assumes its extreme rotatlvely positioned in either one of two positions separated by dependent upon whether the figures shift function or'the letters shift shaft zu. is thereupon rotated to a position dependent upon `the particular permutation of signal elements asians? function is desired. In this extreme right hand position of the typewheel Blythe radially slidable element I (Figs. 8 and9) will project oi!- there are no characters opposite the hammer I 01 so that no character is printed upon tape 00.'

When the typewheel 50 is axially and circum- A ferentially positioned so as toalign a character with the printing plunger or hammer |01. the rotation of shaft 25A/will i'irst rotate -the cam 34 (Fig. 1) to depress the lever |02 about its pivot |03 to in turn depress the hammer |01 against the force of spring |00 until the latch |00 'engages notch i0`in in hammer i01- and the latch is maintained in position by means of the spring i098. Also while lever |02 is being depressed, the pawl I 00 slips back one tooth on the ratchet wheel 09 and upon release of lever |02 by the continued rotation vof cam 3l, spring i0! will raise vvthe lever |02 and pawl |00 will advance the ratchet wheel 90 to rotate the rollers Sia and Sib, and rollers 90a and 00h to thereby advance the tape. As the shaft 25A continues to rotate, cam 0I engages the cam 9 to rotatively position one of said shafts, Ameans g controlled by others of said signal elements for rendering 'another of said clutches operative and for selectively stopping the same at different f -portions of a' revolution to rotatively position l the other of said shafts, a typewheel mounted for axial and rotative movement, means controlled by one of said shafts for rotatively positioning said typewheel, and means controlled by follower i096 to release the latch i09 and the'4 hammer |01 will thereupon force the tape 06 and the ribbon IIS against the chosen aligned character of typewheel 50 (Fig. yl) to print the selected character. f

While shaft 25A is rotating, cam 35 will engage the lever IIO to raise the link H2 (Fig. 14) to therebyrotate one ofthe spools il! or i to wind up the ribbon on one spool and to .unwind v it from the other, as described above. vWhen the ribbon is completely unwound, the ribbon feed reversal mechanism will automatically reverse the direction of windingas previously explained.

Novel selecting means are therefore provided for axially and circumferentially locating a typethe other of said shafts for axially. positioning said typewheel. 'Y t 2. In a telegraph receiver of the type wherein the selection of characters is controlled by a per- `mutation selector, a yselecting and positioning driving means', means controlled byv certain sig: nal elements of a received code signal for dis"` connecting one of said shafts from its driving means and holding it inany one of a plurality of rotary positions, rmeans controlled by the others of said signal elements for disconnecting the other shaft from its driving means and holding it in any one of a plurality of rotary positions, a typewheel mounted for axial and rotary movement andconnected to one of said shafts for rotary positioning thereby, and means controlled by said other shaft for axially positioning said typewheel. c

3. In a telegraph receiver ofthe type .wherein the selection of characters is controlled by a permutation code selector, a permutation selecting mechanism, a typewheel mounted for rotary and axial movement, a rotary shaft, means for rotating said shaft, clutch means for connecting said rotating means and shaft and rotatively positioning said shaft in a plurality 'of predetermined positions, a second rotary shaft, means for rotating said shaft, clutch means for connecting said rotating means and shaft and roone of said shafts for rotatively positioningsaid tion it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art, without departing from the spirit of the inven- -tion. It is the intention, therefore, to be limited only as indicated by the scope of the following claims. d

What is claimed is:

l. In a telegraph receiver of the type wherein the selection of characters -is controlled by a permutation code selector, a selecting mechanism comprising a pair of shafts, driving means for said shafts, clutch means for individually and independently connecting said shafts and driving means, means controlled by certain elements of a received code signal for rendering one of said clutches operative and for selectively stopping typewheel, means controlled by the other of said shafts for axially positioning said typewheel, means including said selecting mechanism .and

responsive to certain of the code elements of vother of said clutch means.

4. In a printing receiver, typewheel position-- ing apparatus comprising a pair of rotatable shafts, means for rotating said shafts, clutch means for respectively connecting said shafts and said rotating means, stop means selectively the same at different portions of a revolution controlled by certain code signal elements of a received code signal for arresting each of said clutches in different rotative positions in accordance with the particular permutation of code signal elements receivedyand means controlled by said shafts for axially and rotatively positioning said typewheel.

5. In a printing receiver', typewheel position-- ing apparatus comprising a pair of rotatable shafts, means for rotating said shafts, clutches for respectively connecting said shafts and rotating means, stop means selectively controlled bycertain signal elements of a received code signal for arresting each of said clutches in different rotative positions in accordance with the particular permutation of code signal elements received,.means controlled by the rotation of one of Isaid shafts for rotatively positioning said typewheel, and means controlled by the other of said shafts for axially positioning said typewheel.

.6. In a printing receiver,typewheel positioning apparatus comprising a plurality of rotatable shafts, means for rotating said shafts, clutch l typewheel, and means, controlledfby another of said shafts for shifting said typewheel.

7. In a printing receiver, typewheel positioning mechanism comprising a plurality of shafts, means controlled by the rotation of one of said shafts for rotatively positioning said typewheel,

of said shafts for axiallypositioning said typewheel, and means controlled by the rotation of another shaft and cooperating with said typewheel in one position thereof for 'adjusting the rotative position of said typewheel. Y

8. In a telegraph receiver of the type' wherein the selection of characters iscontrolied by a permutation code selector, a selecting mechanism comprising permutation elements relatively adjustable in accordance with received code signal elements, a typewheel, and means for rotatively positioning said typewheel comprising a clutch, means controlled by said clutch 'rotating said vtypewheel,-and means controlled by said permutation elements for selectively arresting said clutch at different portions of one complete revolution to therebyadjust the position of said typewheel in accordance with the particular permutation of code signal elements received.

9.' In a telegraph receiver of the type wherein the selection of characters is controlled by a permutation code selector a selecting mechanism comprising permutation elements relatively adjustable in accordance with received code signal elementsga typewheel and means forrotatively and axially positioning said typewheel compris-l ing a clutch, means controlled by said clutch for rotatively positioning said typewheel, means controlled by certain of said permutation members for selectively arresting said clutch at different portions of one complete` revolution to thereby rotatably adjust the position of said typewheel in accordance with the permutations of certain code signal elements received,A` a second clutch,

means controlled by said clutch for rotatively positioning an'A operating member, means controlled bycertain others of said permutation members for selectively arresting said clutch at dlii'erentportions of one complete revolution to thereby rotatively adjust the position of said operating member, and means controlled by said operating member foraxially positioning said typewheel.

10. In a telegraph receiver of the type wherein the selection of characters is controlled by a permutation code selector, a selecting mecha-V nism, a typewheel provided with a plurality of rings of type, successive rings being spaced axially of said typewheel', said rings each comprising alternately figures and letters characters, and said selecting mechanism including means for determining the initial rotary positions of said typewheel, and shiftmeans for determining the final rotary positions of `said typewheel.

i1. In a telegraph receiver of the type wherein the selection of characters is controlled by a permutation code selector, a selecting mechanism. a typewheel provided with a plurality of rings of type, successive rings beingspaced axially of said typewheel, said rings each comprising alternately ngures and letters characters, vsaid selecting mechanism comprising means for determining the initial rotary positions of said typewheel and means for determiningthe axial positions of said typewheel, and shift means controlled by said selecting mechanism for determining the final rotative positioning of said typewheel.

12. A telegraph receiver comprising a type- 1'5 wheel having a plurality of rings of type thereon. means forV axially shifting said typewheel to select a given ring of characters, means for rotating said typewheel to select one character from a chosen ring, permutation code selector mechanism includingmeans permutatively conmeans controlled by the rotation of another one trolled by received signal elements to selectively control said axial shifting means, means permutatively controlled by received signal elements for controlling said rotating means, and shift means operative in one axial position ot said typewheel for finally rotatively positioning s aid typewheel. Y

13. In aprinting telegraph receiver including a rotatable typewheel, means for selectively stopping said typewheel in accordance with permutationsof code signal elements, shift means, printing means, power driven printing operating means. and means effective upon stoppage of said wheel and cooperating with said power driven means to operate said shift means.

14. In a telegraph receiver of the type wherein the selection of characters is controlled by a permutation code selector, a selecting v mechanism comprising a'piurality of magnets, one for each of certain elements of a code, a plurality of rotatable vannular disk members, means controlled upon energization of each magnet for rotating a cooperating disk, means resiliently opposing the rotation of said disk and returning said disk to a first position upon deenergization of the corresponding magnet, a plurality of notches in each of said disks distributed about the periphery thereof, one group ofy said notches on said disks respectively, being aligned in each rotative position of each of said disks, a plurality of stop members, one for each notch, and distributed about the peripheries of said disks, means resiliently biasing said stop members against the notched periphery of said disks whereby one stop member only, is operatively moved into a chosen alignment of notches upon selective operation of saiddisks, a clutch including means for produci ing engagement of said clutch and controlled by said stop member forstopping said clutch in different portions of one complete rotation thereof in accordance with the selected stop member, a typewheel and means controlled by said clutch for selectively positioning said typewheel.

vl5. In a telegraph receiver of the type wherein the selection of characters is controlled by a permutation code selector, a typewheel, a selecting mechanism for positioning said typewheel and comprising a plurality of magnets, one for each element of code, a. plurality of rotatable annular disk'members disposed in axial alignment, a second plurality of rotatable annular disk members disposed in axial alignment, means controlled upon energization of certain of said magnets, respectively, for rotating a corresponding disk of one plurality, means controlled upon energization of the others of said magnets, respectively, for rotating a corresponding disk of the other plurality, means resiliently opposing the rotation of each of said disks, means interlocking the disks of one plurality with the disks of the other plurality to maintain said disks in one position or the other, means on said interlocking member cooperating with each of said disks whereby upon rotation of any one disk, said interlocking member is cammed out of operative position to permit return under the action of said resilient means of all disks corresponding to deenergized magnets, means controlled byone of said plurality of disks for producing rotative setting of said typewheel, and means controlled by the other plurality for producing axial setting of said typewheel. -16. In a printing receiver, a plurality of permutation disks, a second plurality of permutation disks', means resiliently biasing said disks to one position, means for selectively and rotatably changing the positions of said disks to another position in accordance with received code signal elements, a pivoted member, means biasing the respective ends of said pivoted member against the peripheries of the respective pluralities of disks, means on said pivoted member cooperating with means on said disk peripheries to hold said disks in position, said means on said member being cammed away from said disks upon rotation of any one disk to release said disks selectively for return to said rst position.

17. In a printing receiver, a plurality of permutation notched disks, a second plurality of permutation notched disks, means resiliently biasing said disks to one position, means for interlocking the respective ringsof said diierent pluralities and engaging the notches on said disks to retain them in position, means responsive to received code signal elements for ,selectively operating said disks to rotate them to another position, said interlocking means being cammed out of contact with said notches during said relative rotation, said responsive means produc- Y ing an overthrow between said interlocking means and said disks whereby all non-operated disks are returned to the iirst position for all code signal permutations.

' CLYDE J. FITCH.

KURT R.. SCHNEIDER.- 

